tclAppInit.c
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- /*
- * tclAppInit.c --
- *
- * Provides a default version of the main program and Tcl_AppInit
- * procedure for Tcl applications (without Tk). Note that this
- * program must be built in Win32 console mode to work properly.
- *
- * Copyright (c) 1996-1997 by Sun Microsystems, Inc.
- * Copyright (c) 1998-1999 by Scriptics Corporation.
- *
- * See the file "license.terms" for information on usage and redistribution
- * of this file, and for a DISCLAIMER OF ALL WARRANTIES.
- *
- * RCS: @(#) $Id: tclAppInit.c,v 1.11.2.3 2007/03/19 17:06:26 dgp Exp $
- */
- #include "tcl.h"
- #include <windows.h>
- #include <locale.h>
- #ifdef TCL_TEST
- extern int Procbodytest_Init _ANSI_ARGS_((Tcl_Interp *interp));
- extern int Procbodytest_SafeInit _ANSI_ARGS_((Tcl_Interp *interp));
- extern int Tcltest_Init _ANSI_ARGS_((Tcl_Interp *interp));
- extern int TclObjTest_Init _ANSI_ARGS_((Tcl_Interp *interp));
- #ifdef TCL_THREADS
- extern int TclThread_Init _ANSI_ARGS_((Tcl_Interp *interp));
- #endif
- #endif /* TCL_TEST */
- static void setargv _ANSI_ARGS_((int *argcPtr, char ***argvPtr));
- static BOOL __stdcall sigHandler (DWORD fdwCtrlType);
- static Tcl_AsyncProc asyncExit;
- static void AppInitExitHandler(ClientData clientData);
- static char ** argvSave = NULL;
- static Tcl_AsyncHandler exitToken = NULL;
- static DWORD exitErrorCode = 0;
- /*
- *----------------------------------------------------------------------
- *
- * main --
- *
- * This is the main program for the application.
- *
- * Results:
- * None: Tcl_Main never returns here, so this procedure never
- * returns either.
- *
- * Side effects:
- * Whatever the application does.
- *
- *----------------------------------------------------------------------
- */
- int
- main(argc, argv)
- int argc; /* Number of command-line arguments. */
- char **argv; /* Values of command-line arguments. */
- {
- /*
- * The following #if block allows you to change the AppInit
- * function by using a #define of TCL_LOCAL_APPINIT instead
- * of rewriting this entire file. The #if checks for that
- * #define and uses Tcl_AppInit if it doesn't exist.
- */
- #ifndef TCL_LOCAL_APPINIT
- #define TCL_LOCAL_APPINIT Tcl_AppInit
- #endif
- extern int TCL_LOCAL_APPINIT _ANSI_ARGS_((Tcl_Interp *interp));
- /*
- * The following #if block allows you to change how Tcl finds the startup
- * script, prime the library or encoding paths, fiddle with the argv,
- * etc., without needing to rewrite Tcl_Main()
- */
- #ifdef TCL_LOCAL_MAIN_HOOK
- extern int TCL_LOCAL_MAIN_HOOK _ANSI_ARGS_((int *argc, char ***argv));
- #endif
- char buffer[MAX_PATH +1];
- char *p;
- /*
- * Set up the default locale to be standard "C" locale so parsing
- * is performed correctly.
- */
- setlocale(LC_ALL, "C");
- setargv(&argc, &argv);
- /*
- * Save this for later, so we can free it.
- */
- argvSave = argv;
- /*
- * Replace argv[0] with full pathname of executable, and forward
- * slashes substituted for backslashes.
- */
- GetModuleFileName(NULL, buffer, sizeof(buffer));
- argv[0] = buffer;
- for (p = buffer; *p != ' '; p++) {
- if (*p == '\') {
- *p = '/';
- }
- }
- #ifdef TCL_LOCAL_MAIN_HOOK
- TCL_LOCAL_MAIN_HOOK(&argc, &argv);
- #endif
- Tcl_Main(argc, argv, TCL_LOCAL_APPINIT);
- return 0; /* Needed only to prevent compiler warning. */
- }
- /*
- *----------------------------------------------------------------------
- *
- * Tcl_AppInit --
- *
- * This procedure performs application-specific initialization.
- * Most applications, especially those that incorporate additional
- * packages, will have their own version of this procedure.
- *
- * Results:
- * Returns a standard Tcl completion code, and leaves an error
- * message in the interp's result if an error occurs.
- *
- * Side effects:
- * Depends on the startup script.
- *
- *----------------------------------------------------------------------
- */
- int
- Tcl_AppInit(interp)
- Tcl_Interp *interp; /* Interpreter for application. */
- {
- if (Tcl_Init(interp) == TCL_ERROR) {
- return TCL_ERROR;
- }
- /*
- * Install a signal handler to the win32 console tclsh is running in.
- */
- SetConsoleCtrlHandler(sigHandler, TRUE);
- exitToken = Tcl_AsyncCreate(asyncExit, NULL);
- /*
- * This exit handler will be used to free the
- * resources allocated in this file.
- */
- Tcl_CreateExitHandler(AppInitExitHandler, NULL);
- #ifdef TCL_TEST
- if (Tcltest_Init(interp) == TCL_ERROR) {
- return TCL_ERROR;
- }
- Tcl_StaticPackage(interp, "Tcltest", Tcltest_Init,
- (Tcl_PackageInitProc *) NULL);
- if (TclObjTest_Init(interp) == TCL_ERROR) {
- return TCL_ERROR;
- }
- #ifdef TCL_THREADS
- if (TclThread_Init(interp) == TCL_ERROR) {
- return TCL_ERROR;
- }
- #endif
- if (Procbodytest_Init(interp) == TCL_ERROR) {
- return TCL_ERROR;
- }
- Tcl_StaticPackage(interp, "procbodytest", Procbodytest_Init,
- Procbodytest_SafeInit);
- #endif /* TCL_TEST */
- #if defined(STATIC_BUILD) && defined(TCL_USE_STATIC_PACKAGES)
- {
- extern Tcl_PackageInitProc Registry_Init;
- extern Tcl_PackageInitProc Dde_Init;
- if (Registry_Init(interp) == TCL_ERROR) {
- return TCL_ERROR;
- }
- Tcl_StaticPackage(interp, "registry", Registry_Init, NULL);
- if (Dde_Init(interp) == TCL_ERROR) {
- return TCL_ERROR;
- }
- Tcl_StaticPackage(interp, "dde", Dde_Init, NULL);
- }
- #endif
- /*
- * Call the init procedures for included packages. Each call should
- * look like this:
- *
- * if (Mod_Init(interp) == TCL_ERROR) {
- * return TCL_ERROR;
- * }
- *
- * where "Mod" is the name of the module.
- */
- /*
- * Call Tcl_CreateCommand for application-specific commands, if
- * they weren't already created by the init procedures called above.
- */
- /*
- * Specify a user-specific startup file to invoke if the application
- * is run interactively. Typically the startup file is "~/.apprc"
- * where "app" is the name of the application. If this line is deleted
- * then no user-specific startup file will be run under any conditions.
- */
- Tcl_SetVar(interp, "tcl_rcFileName", "~/tclshrc.tcl", TCL_GLOBAL_ONLY);
- return TCL_OK;
- }
- /*
- *----------------------------------------------------------------------
- *
- * AppInitExitHandler --
- *
- * This function is called to cleanup the app init resources before
- * Tcl is unloaded.
- *
- * Results:
- * None.
- *
- * Side effects:
- * Frees the saved argv and deletes the async exit handler.
- *
- *----------------------------------------------------------------------
- */
- static void
- AppInitExitHandler(
- ClientData clientData)
- {
- if (argvSave != NULL) {
- ckfree((char *)argvSave);
- argvSave = NULL;
- }
- if (exitToken != NULL) {
- /*
- * This should be safe to do even if we
- * are in an async exit right now.
- */
- Tcl_AsyncDelete(exitToken);
- exitToken = NULL;
- }
- }
- /*
- *-------------------------------------------------------------------------
- *
- * setargv --
- *
- * Parse the Windows command line string into argc/argv. Done here
- * because we don't trust the builtin argument parser in crt0.
- * Windows applications are responsible for breaking their command
- * line into arguments.
- *
- * 2N backslashes + quote -> N backslashes + begin quoted string
- * 2N + 1 backslashes + quote -> literal
- * N backslashes + non-quote -> literal
- * quote + quote in a quoted string -> single quote
- * quote + quote not in quoted string -> empty string
- * quote -> begin quoted string
- *
- * Results:
- * Fills argcPtr with the number of arguments and argvPtr with the
- * array of arguments.
- *
- * Side effects:
- * Memory allocated.
- *
- *--------------------------------------------------------------------------
- */
- static void
- setargv(argcPtr, argvPtr)
- int *argcPtr; /* Filled with number of argument strings. */
- char ***argvPtr; /* Filled with argument strings (malloc'd). */
- {
- char *cmdLine, *p, *arg, *argSpace;
- char **argv;
- int argc, size, inquote, copy, slashes;
- cmdLine = GetCommandLine(); /* INTL: BUG */
- /*
- * Precompute an overly pessimistic guess at the number of arguments
- * in the command line by counting non-space spans.
- */
- size = 2;
- for (p = cmdLine; *p != ' '; p++) {
- if ((*p == ' ') || (*p == 't')) { /* INTL: ISO space. */
- size++;
- while ((*p == ' ') || (*p == 't')) { /* INTL: ISO space. */
- p++;
- }
- if (*p == ' ') {
- break;
- }
- }
- }
- argSpace = (char *) ckalloc(
- (unsigned) (size * sizeof(char *) + strlen(cmdLine) + 1));
- argv = (char **) argSpace;
- argSpace += size * sizeof(char *);
- size--;
- p = cmdLine;
- for (argc = 0; argc < size; argc++) {
- argv[argc] = arg = argSpace;
- while ((*p == ' ') || (*p == 't')) { /* INTL: ISO space. */
- p++;
- }
- if (*p == ' ') {
- break;
- }
- inquote = 0;
- slashes = 0;
- while (1) {
- copy = 1;
- while (*p == '\') {
- slashes++;
- p++;
- }
- if (*p == '"') {
- if ((slashes & 1) == 0) {
- copy = 0;
- if ((inquote) && (p[1] == '"')) {
- p++;
- copy = 1;
- } else {
- inquote = !inquote;
- }
- }
- slashes >>= 1;
- }
- while (slashes) {
- *arg = '\';
- arg++;
- slashes--;
- }
- if ((*p == ' ')
- || (!inquote && ((*p == ' ') || (*p == 't')))) { /* INTL: ISO space. */
- break;
- }
- if (copy != 0) {
- *arg = *p;
- arg++;
- }
- p++;
- }
- *arg = ' ';
- argSpace = arg + 1;
- }
- argv[argc] = NULL;
- *argcPtr = argc;
- *argvPtr = argv;
- }
- /*
- *----------------------------------------------------------------------
- *
- * asyncExit --
- *
- * The AsyncProc for the exitToken.
- *
- * Results:
- * doesn't actually return.
- *
- * Side effects:
- * tclsh cleanly exits.
- *
- *----------------------------------------------------------------------
- */
- int
- asyncExit (ClientData clientData, Tcl_Interp *interp, int code)
- {
- Tcl_Exit((int)exitErrorCode);
- /* NOTREACHED */
- return code;
- }
- /*
- *----------------------------------------------------------------------
- *
- * sigHandler --
- *
- * Signal handler for the Win32 OS. Catches Ctrl+C, Ctrl+Break and
- * other exits. This is needed so tclsh can do it's real clean-up
- * and not an unclean crash terminate.
- *
- * Results:
- * TRUE.
- *
- * Side effects:
- * Effects the way the app exits from a signal. This is an
- * operating system supplied thread and unsafe to call ANY
- * Tcl commands except for Tcl_AsyncMark.
- *
- *----------------------------------------------------------------------
- */
- BOOL __stdcall
- sigHandler(DWORD fdwCtrlType)
- {
- HANDLE hStdIn;
- if (!exitToken) {
- /* Async token must have been destroyed, punt gracefully. */
- return FALSE;
- }
- /*
- * If Tcl is currently executing some bytecode or in the eventloop,
- * this will cause Tcl to enter asyncExit at the next command
- * boundry.
- */
- exitErrorCode = fdwCtrlType;
- Tcl_AsyncMark(exitToken);
- /*
- * This will cause Tcl_Gets in Tcl_Main() to drop-out with an <EOF>
- * should it be blocked on input and our Tcl_AsyncMark didn't grab
- * the attention of the interpreter.
- */
- hStdIn = GetStdHandle(STD_INPUT_HANDLE);
- if (hStdIn) {
- CloseHandle(hStdIn);
- }
- /* indicate to the OS not to call the default terminator */
- return TRUE;
- }